Facing material for cork or other disks for bottle-caps.



c. E. MCMANUS.

FACING MATERIAL FOR CORK 0R OTHER DISKS FOR BOTTLE CAPS.

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Uw; vw by 52M( APPLCATION FILED MAY 9, 1916. www@ CHARLES E. MOMANUS, 0F NEW YORK', N. Y.

FCmG MTERIL FOR CORK 0R OTHER DISKS FOR BOTTLE-CAPS.

Speciiication. of Letters Patent.

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' Application med May 9, 1916. Serial No. 96,304.

To all lwhom it may concern:

Be it known that I, CHARLES E. Md.

Disks for Bottle-Caps, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

My invention relates to facing material for cork or other disks for bottle caps andv more particularly to material of this kind wherein the face presented toward the contents of the bottle is a metal foil.

Heretofore cork or other disks for bottle caps have had the central portion thereof provided with a. facing disk-to protect the cork or other disk from the action of the contents of the bottle, and prevent contamination of the contents of the bottle, through contact with said cork or other disk. Various types of facing disks have been used, and have been applied tothe cork or other disks, in di'erent manners. p

lt has been attempted to use metal foil disks, but such have proven impracticable for the reason that it has been found eX- tremely diiicult to provide a stable bond between the cork or other disk and the metal foil disk, such being of vital importance to a disk faced with metal foil owing to the tendency of the agitators in the hopper of the bottling machine to separate the foil from the cork or other disk, or to raise the edge thereof therefrom. lt has been proposed to 'slot the cork or other disk and form a cup of the metal foil and seat the rim of the cup in said slot, but this has not been found satisfactory, since it weakens the cork or other cushion and tends toward the formation of channels or leaks, through the slot. Furthermore, metal foil has practically no elasticity and low tensile strength and consequently in vview of the diiliculty of securing a permanent bond, coupled with the lack of elasticity of the foil preventing its yielding with the cork ory other cushion disk, the diiculty of producing a workable metal faced cushion disk is practically insurmountable where metal alone is used for the facing material. ln addition to theA foregoing it is necessary to apply facing disks to the cork or other cushion disks so rapidly that they can be handled commercially only by machinery and metal foil alone cannot be fed satisfactorily in a machine and it is practically impossible to cut disks therefrom as required which will present a clean sharp edge.

By my invention, l am enabled to provide a facing material utilizing much thinner metal foil than is possible when using the metal foil alone, for the facing, the .facing material being so constituted that when applied to the cork or other disk, it

will be firmly bonded thereto and not liable to displacement through the contact therewith of the agitators in the hoppers of the capping machine. I secure these results by providing a flexible reinforcement or backing for the metal foil before it is applied to the cork or other disk, the metal foil being firmly bonded to this reinforcing backing and the backing being firmly bonded to the cork or other disk. This manner of forming the material permits the binding medium between the metal foil and the reinforcement or backing to iirmlyset before the facing disk is applied to the cork or other disk and permits greater uniformity in the distribution of the binding medium so as to avoid any weak spots which might tend toward the separation of the foil and its backing. This binding medium may also be selected with a View to its non-absorbent, gas impermeable property.

The material when ready for application tothe cork or other disk is sufficiently rigid by reason of the binder between the metal foil and its backing, `to insure a clean cutting of the disks, and the accurate feeding of the material in the machine. I also contemplate providing suicient slack in the metal foil to permit that stretch incidental to the application of a cap to a bottle.

The invention consists in a facing material for cork or other disks for bottle caps, consisting of metal foil provided with a reinforcement or backing of fibrous material having one surface thereof gummed, and the other surface thereof firmly bonded to said metal foil by a stratum of a binding medium and in such other novel features of construction and combination of parts as are hereinafter. set forth and; described and more particularly pointed out in the claims hereto appended.

In the accompanying drawings, I have shown a section of a strip of facing material embodying my invention.

In making the material of the invention, I preferably employ tin foil a which may be of a thickness no greater than .001942` of an inch. This foil is backed or reinforced with fibrous-material b, preferably paper,

the foil being firmly bonded to the paper by a bindingmedium whichL is applied to the paper or other backing in a thin stratum c so as to insure uniformity of the bond be-l tween all parts of the adjoining surface of the foil and its backing. The paper or other backing has the surface thereof other than that to which the foil is to be or has been applied, gummed as indicated lat d so as to permit the application of the facing to the cork or other disks by the application of a damping material to the face of the cork or other disk and thus facilitate the feeding and application of the casing material to the cork or other disk. By using a fibrous reinforcement or backing, the gum and the binding medium between the backing and the foil may readily`penetrate this reinforcing backing material, to an extent to minimize any tendency of the facing disk to separate from the cork or other disk, or the foil to separate from said reinforcing or.

backing'disk. v

rIhere are a number of binding mediums which may be used, such as sodium silicate, which will form a firm bond between the foil and the paper. Binding mediums of this type have the further advantage that they are insoluble when once set and form a continuous film which is substantially impermeable to gases. Since flexibility in the facing material is desirable, when I use sodium silicate, I mix with it a small percentage of glycerin in order to impart some ieXibility to the stratum of binding material. f I do not desire to limit myself to the use of sodium silicate, however, as there are many equivalent binding materials which will have the desired effect of insuring a permanent bond between a metal foil and a backing or reinforcement of paper or other fibrous material.

By applying the foil to the backing material and cutting the disks therefrom, I secure two distinct advantages; first, the binding medium between the foil and the backing or `reinforcing material may be allowed to set before the disks are cut therefrom or are applied to the cork or other disk, thus securing a firm bond between. the foil and its backing which it is impossible to obtain when the binding medium is applied to the foil, or the cork or other disk as the lacing disk is applied thereto; second, the blnding medium after it is set, will impart sufficient rigidity or crispness to the facing material to insure a clean sharp edge upon the facing disks when they are cut from a strip of the facing material. 1

In addition to the foregoing, I also secure the advantage that the paper or other reinforcing or backing material may have a suitable gum applied thereto prior to the feeding of the material in a machine, so that it is merely necessary to applyl a damping medium to the cork or other disk to secure a firm bond between the reinforced metal foil disk and the cork or other disk. If desired the foil may be crinkled by being run between knurled rollers to produce sufficient slack therein to permit that stretch of the facing material incidental to the application of a cap to a bottle.

It is not my intention to limit the invention to the precise manner of assembling the facing material as herein described, it being apparent that the binding medium employed, as specifically referred to, is not material to the invention' considered in its broader aspects. y

Having described the invention, what I claim as new and desire to have protected by Letters Patent is l. A facing material for cork or other disks for bottle caps consisting of metal foil provided with a reinforcement or backing of brous material having one surface thereof gummed and the other surface firmly bonded to said metal foil by a stratum of a binding medium.

2. A facing material for cork or other disks for bottle caps consisting of metal foil having a paper reinforcement or backing, one surface of said paper being gummed and the other surface thereof being firmly bonded to said metal foil by a stratum of a binding medium.

3. A facing material for cork or other disks for bottle caps consisting of metal foil having a paper reinforcement or backing, one surface of said paper being gummed and the other surface thereof being firmly bonded to said metal foil by a stratum of a binding medium, said paper reinforcement or backing being relatively thicker than said metal foil.

4. A facing material for cork or other disks for bottle caps consisting of metal foil provided with a reinforcement or backing of fibrous material having one surface gummed and the other surface firmly bonded to said metal lfoil by a stratum of a substantially non-absorbent, gas-impervious binding medium having relatively less flexibility than said metal foil or its backing.

5. A facing material for cork or other disks for bottle caps consisting of tin foil having a paper reinforcement or backing, one surface of said paper beinggummed :Lamaze and the other surface thereof being firmly bonded to said tin foil by a stratum of substantially non-absorbent gas impervious binding medium having relatively less flexibility than said tin foil or said paper, said paper being relatively thicker than said 'tin 6. A facing material for cork or other disks for bottle caps consisting of metal foil provided with a reinforcement )or backing of brous material having one surface thereof gummed and the other surface firmly bonded to said metal foil by a stratum of a binding medium, said metal foil being crinkled or indented to provide slack therein whereby said foil will be relieved from ten- Sile strains when the bottle cap -is applied tov a bottle.

lln witness whereof I have hereunto aiiixed my signature in the presence of two subscribing Witnesses, thls 8th day of May, 

